came the Quaternary era: a world we can recognise: Hominids, mammoths and the sabertooth to Homo sapiens, elephants, and tigers.
The events of the Cenozoic era from the end of the dinosaurs via the K/T extinction to an empty world for mammals to fill and was followed by a series of filters of natural selection that created the world of the mammals: this is the rise of the mammals.
selection that created the world of the mammals: this is the rise of the mammals.
A NEW CHALLENGE
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